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Commit 76a54095 authored by Arnaud Lacombe's avatar Arnaud Lacombe
Browse files

kconfig: add a symbol string expansion helper 



Signed-off-by: default avatarArnaud Lacombe <lacombar@gmail.com>
Reviewed-by: default avatarSam Ravnborg <sam@ravnborg.org>
Reviewed-by: default avatarMichal Marek <mmarek@suse.cz>
parent c0920a1c

scripts/kconfig/lkc_proto.h

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ P(symbol_hash,struct symbol *,[SYMBOL_HASHSIZE]); 


P(sym_lookup,struct symbol *,(const char *name, int flags));

P(sym_find,struct symbol *,(const char *name));

P(sym_expand_string_value,const char *,(const char *in));

P(sym_re_search,struct symbol **,(const char *pattern));

P(sym_type_name,const char *,(enum symbol_type type));

P(sym_calc_value,void,(struct symbol *sym));

scripts/kconfig/symbol.c

+49 −0
Original line number Diff line number Diff line
@@ -840,6 +840,55 @@ struct symbol *sym_find(const char *name) 
	return symbol;

}



/*

 * Expand symbol's names embedded in the string given in argument. Symbols'

 * name to be expanded shall be prefixed by a '$'. Unknown symbol expands to

 * the empty string.

 */

const char *sym_expand_string_value(const char *in)

{

	const char *src;

	char *res;

	size_t reslen;



	reslen = strlen(in) + 1;

	res = malloc(reslen);

	res[0] = '\0';



	while ((src = strchr(in, '$'))) {

		char *p, name[SYMBOL_MAXLENGTH];

		const char *symval = "";

		struct symbol *sym;

		size_t newlen;



		strncat(res, in, src - in);

		src++;



		p = name;

		while (isalnum(*src) || *src == '_')

			*p++ = *src++;

		*p = '\0';



		sym = sym_find(name);

		if (sym != NULL) {

			sym_calc_value(sym);

			symval = sym_get_string_value(sym);

		}



		newlen = strlen(res) + strlen(symval) + strlen(src);

		if (newlen > reslen) {

			reslen = newlen;

			realloc(res, reslen);

		}



		strcat(res, symval);

		in = src;

	}

	strcat(res, in);



	return res;

}



struct symbol **sym_re_search(const char *pattern)

{

	struct symbol *sym, **sym_arr = NULL;